The structure of palladium-rich solid solutions (α-phase) with a composition near 25 atomic % manganese in a palladium-manganese system has been investigated by electron diffraction using thin oriented, evaporated films, and an ordered phase, Pd_3Mn, has been found to exist in the equilibrium state below about 650℃. The structure of this phase is a periodic one-dimensional anti-phase domain structure of the Ag_3Mg type composed of cubic fundamental cells, the domain size being twice this cell. This ordered phase was not detected by previously reported X-ray studies, probably due to the long relaxation time for ordering of this phase.
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 16 64-64, 1964